74721842 has 16 divisors (see below), whose sum is σ = 124599552. Its totient is φ = 33374160.

The previous prime is 74721839. The next prime is 74721863. The reversal of 74721842 is 24812747.

It is a happy number.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45548 + ... + 47159.

It is an arithmetic number, because the mean of its divisors is an integer number (7787472).

Almost surely, 2^74721842 is an apocalyptic number.

74721842 is a deficient number, since it is larger than the sum of its proper divisors (49877710).

74721842 is a wasteful number, since it uses less digits than its factorization.

74721842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92753.

The product of its digits is 25088, while the sum is 35.

The square root of 74721842 is about 8644.1796603264. The cubic root of 74721842 is about 421.1943367002.

The spelling of 74721842 in words is "seventy-four million, seven hundred twenty-one thousand, eight hundred forty-two".